The art world knows how to capitalize on a cultural moment like any other glamour industry. Hence, Larry Gagosian’s Thursday-night-before-the-Oscars show openings at Gagosian Beverly Hills have been a fixture on the Academy Awards party circuit for decades. The coveted slot is usually reserved for mega-stature modern artists such as Julian Schnabel and Jeff Koons. This year, the honor went to Damien Hirst, who presented his latest series, “The Veil Paintings,” after a six-year absence from Los Angeles.